A kind of composite ceramic filter core and preparation method thereofTechnical field
The invention belongs to filtering material technical field, specifically a kind of composite ceramic filter core and preparation method thereof.
Background technology
Filtering material purposes is very extensive, is widely used in the industry such as chemical industry, electric power, metallurgy, oil, electronic apparatus, machinery; Modal have an air filter for automobile, for filtering the air that enters engine, the mechanical impurity compositions such as airborne particulate matter, particulate stopped, prevents that these compositions from entering in gasoline, diesel oil or machine oil, guarantees engine work.Also has a large amount of filtering materials for air conditioning system, ambient atmosphere pollutes very serious now, greatly be detrimental to health, air filting material can be by the various deleterious particle thing absorption of air, prevent from entering people's life or Working environment, reduce the suction of human lung to objectionable impuritiess such as particulate matter, improve people's quality of life, reduce the generation of disease.Some is for water filtration and sewage disposal, for separating of the heavy metal in water or objectionable constituent.Existing filtering material mainly contains ceramic honey comb, filter paper, woven wire etc.Existing honeycomb ceramic filter material feedstock is joined function singleness, can not meet the requirement of technology development.
Summary of the invention
The object of this invention is to provide a kind of composite ceramic filter core and preparation method thereof.
The technical solution adopted in the present invention is:
A composite ceramic filter core, is characterized in that being made by the raw material of following weight part:
Diatomite 12-14, gac 36-38, carbon nanotube 2-3, Silver Nitrate 1-2, Coconut Fatty Acid Monoethanolamide 4-5, Starso 7-9, propylene glycol 8-10, starch 3-5, bicarbonate of ammonia 3-4, modified alta-mud 20-25, water are appropriate.
Described modified alta-mud is made by following methods:
Wilkinite is put into 520-540 ℃ of calcining 3-4 hour, take out, cooling, put into 10-12% hydrochloric acid soln and soak 2-3 hour, then put into 10-12% sodium hydroxide solution and soak 1-2 hour, take out, with pure water, clean, dry grinding powder; Add be again equivalent to the aluminium nitride of wilkinite weight 35-40%, the alum powder of the Dogbane Leaf of 16-18%, 2-3%, the brown powdered sugar of the zeolite powder of 2-3%, 3-4%, mix and blend 30-40 minute, and then spray into and be equivalent to wilkinite weight 5-7%'slinking agent TAC, under 12000-15000 rev/min, stir 40-50 minute, obtain.
The preparation method of described composite ceramic filter core, is characterized in that comprising the following steps:
Each mixing of materials is even, vacuum pugging, compression moulding, 4-6 hour is placed in ageing, send into sintering processes in tunneled sintering kiln, at 420-450 ℃ after sintering 2-3 hour, with 6-8 ℃/min of speed, be warming up to 650-680 ℃, sintering 2-3 hour, then, with 10-12 ℃/min of speed, be warming up to sintering 3-4 hour at 1050-1080 ℃ again, take out coolingly, send in the hydrochloric acid soln of 3-4% and soak 3-4 hour, then, send in the potassium permanganate solution of 400-450ppm and soak 2-3 hour, take out and dry and get final product.
Carbon nanotubes of the present invention, can improve the mechanical property of ceramic element; Multi-walled carbon nano-tubes has meso-hole structure simultaneously, can remove heavy metal ion in water by active adsorption.The present invention can for the air filtration of air conditioning system, also can be for water filtration, can also, for the air-breathing filtration of automobile filter, be applicable to the severe place of various environment.
Embodiment
A composite ceramic filter core, by following weight part (kilogram) raw material make:
Diatomite 14, gac 38, carbon nanotube 2, Silver Nitrate 2, Coconut Fatty Acid Monoethanolamide 5, Starso 7, propylene glycol 10, starch 5, bicarbonate of ammonia 4, modified alta-mud 20, water are appropriate.
Described modified alta-mud is made by following methods:
Wilkinite is put into 520-540 ℃ of calcining 3-4 hour, take out, cooling, put into 10-12% hydrochloric acid soln and soak 2-3 hour, then put into 10-12% sodium hydroxide solution and soak 1-2 hour, take out, with pure water, clean, dry grinding powder; Add again and be equivalent to the aluminium nitride of wilkinite weight 40%, 18% Dogbane Leaf, 3% alum powder, 3% zeolite powder, 4% brown powdered sugar, mix and blend 30-40 minute, and then spray into and be equivalent to wilkinite weight 7%linking agent TAC, under 12000-15000 rev/min, stir 40-50 minute, obtain.
The preparation method of composite ceramic filter core, comprises the following steps:
Each mixing of materials is even, vacuum pugging, compression moulding, 4-6 hour is placed in ageing, send into sintering processes in tunneled sintering kiln, at 420-450 ℃ after sintering 2-3 hour, with 6-8 ℃/min of speed, be warming up to 650-680 ℃, sintering 2-3 hour, then, with 10-12 ℃/min of speed, be warming up to sintering 3-4 hour at 1050-1080 ℃ again, take out coolingly, send in the hydrochloric acid soln of 3-4% and soak 3-4 hour, then, send in the potassium permanganate solution of 400-450ppm and soak 2-3 hour, take out and dry and get final product.
Sample main technical details of the present invention is: heat shock resistance: 950 ℃-20 ℃ air-cooled does not once split; 1250 ℃ of maximum operation (service) temperatures.The technical indicator of exhaust gas purification and treatment device is: process 550 ℃ of gas top temperatures; Trapping micronic dust efficiency >=99%; Outlet discharge soot dust granule substrate concentration≤30mg/m3; The dust granules minimum grain size scope 1-10 μ mm catching.